Former President Donald Trump’s testimony in the E. Jean Carroll trial today was more about preparing to use the result as a soapbox than to actually try to notch a legal win, argued biographer David Cay Johnston on Thursday’s edition of MSNBC’s “The ReidOut.” Carroll alleges the former president sexually assaulted her in the dressing room of a Manhattan department store, although the current trial does not put that fact, which was litigated in a former civil trial, in dispute, and purely seeks to assess damages. “I want to play the infamous ‘Access Hollywood’ tape and how he responded to the …